Bug Description

If you hit this bug and are unable to boot, you can boot back into the last working kernel. To do that, select that version(Probably 4.4.0-104) from the GRUB menu.

The GRUB menu can be accessed by holding the 'Shift' key after powering on the system(Some systems require the 'ESC' key to be held instead of Shift). Detailed information about GRUB can be found here:https://help.ubuntu.com/community/Grub2

1. Install the target pre-installed image (Xenial 4.4-based stack) for the platform.
2. Fetch the kernel 4.4.0-108.131 from this PPA https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/pti/
3. Update the system by "sudo apt-get dist-upgrade"
4. After the system update, reboot it.
5. Check the syslog after the system is ready to use again.

Hi, I am not an expert and have basic functional operating knowledge of Ubuntu. I am using a Dell Latitude 5480 and Ubuntu 16.04 LTS. I did a software update this morning and since then I am unable to shut down and get the error starting with -